Journal of food science and technology(Iran)

Journal of food science and technology(Iran)

Improvement of the Quality Characteristics of Gluten-Free Bread Using Faba Bean Protein Isolate and Balangu Shirazi (Lallemantia royleana) Seed Mucilage

Document Type : Original Article

Authors
1 مطهری جنوبی 25 پلاک 80 طبقه اول
2 Gorgan University of Agricultural Sciences and Natural Resources – Faculty of Food Science and Technology
3 organ University of Agricultural Sciences and Natural Resources – Faculty of Food Science and Technology
10.48311/fsct.2026.117083.82909
Abstract
This study aimed to enhance the quality attributes of gluten-free bread by utilizing faba bean protein isolate and Lallemantia royleana (Shirazi balangu) seed mucilage as functional gluten substitutes. The absence of gluten, which is crucial for dough structure and bread texture, often leads to quality deterioration in gluten-free formulations, particularly for individuals with celiac disease. Therefore, incorporating protein isolates and hydrocolloids is essential to compensate for the lost functional properties. Four independent variables—soy protein isolate, faba bean protein isolate, carboxymethyl cellulose (CMC), and Lallemantia royleana seed mucilage—were used at varying levels, and physicochemical, textural, and sensory evaluations were performed on the bread samples. Results indicated that higher proportions of protein isolates and seed mucilage increased dough firmness. Compared to soy protein isolate, faba bean protein isolate reduced baking loss and improved crumb porosity. CMC led to a greater reduction in baking loss than Lallemantia royleana mucilage, while the combined use of soy protein isolate and mucilage significantly increased porosity and improved textural cohesiveness. Soy protein isolate had a stronger effect on crust browning compared with faba bean protein isolate. Optimization results identified the formulation containing 0.981% soy protein isolate, 3.59% faba bean protein isolate, and 0.422% Lallemantia royleana seed mucilage as the optimal combination for producing gluten-free bread with desirable textural and sensory properties.
Keywords
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